/*
  Created on Jul 23, 2005
  (C) 2005 
  @author Michael Ocean

  This program is free software; you can redistribute it and/or
  modify it under the terms of Version 2 of the GNU General Public 
  License.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.
  
  You should have received a copy of the GNU Library General Public
  License along with this library; if not, write to the Free
  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

package sxe.core;

import snobject.snBoolean;
import snobject.snObject;
import snobject.snObjectArgList;
import step.EvaluationFailure;
import step.FunctionWrapper;

public class not extends FunctionWrapper {

	@Override
	/** boolean in, not(in) out. */
	public snObject Call(snObjectArgList argv) throws EvaluationFailure,
			ClassCastException {

		snBoolean snb = argv.popBoolean();
		if(snb.equals(snBoolean.FALSE))
			return snBoolean.TRUE;
		
		return snBoolean.FALSE;
		
	}
}
